Precision measurement of antimatter made

The charge of antihydrogen atoms is neutral, at least out to eight decimal places, a new measurement made at CERN shows. Because hydrogen atoms have an electrically neutral charge and the charge of antihydrogen atoms is expected to match, the result, published June 3 in Nature Communications, isn't surprising.

However, the new measurement is roughly a million times more precise than previous estimates. Continuing to make such precise measurements and possibly finding slight differences between atoms and antiatoms could help scientists determine why there is more matter than antimatter in the universe.